31301431420 has 96 divisors (see below), whose sum is σ = 76610096640. Its totient is φ = 10520720640.

The previous prime is 31301431397. The next prime is 31301431433. The reversal of 31301431420 is 2413410313.

It is a junction number, because it is equal to n+sod(n) for n = 31301431391 and 31301431400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2615811 + ... + 2627749.

It is an arithmetic number, because the mean of its divisors is an integer number (798021840).

Almost surely, 2^31301431420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31301431420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38305048320).

31301431420 is an abundant number, since it is smaller than the sum of its proper divisors (45308665220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31301431420 is a wasteful number, since it uses less digits than its factorization.

31301431420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12323 (or 12321 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31301431420 its reverse (2413410313), we get a palindrome (33714841733).

The spelling of 31301431420 in words is "thirty-one billion, three hundred one million, four hundred thirty-one thousand, four hundred twenty".